CN101651498B - Repeater and method for removing pilot frequency pollution by same - Google Patents
Repeater and method for removing pilot frequency pollution by same Download PDFInfo
- Publication number
- CN101651498B CN101651498B CN2009101899199A CN200910189919A CN101651498B CN 101651498 B CN101651498 B CN 101651498B CN 2009101899199 A CN2009101899199 A CN 2009101899199A CN 200910189919 A CN200910189919 A CN 200910189919A CN 101651498 B CN101651498 B CN 101651498B
- Authority
- CN
- China
- Prior art keywords
- alms giver
- sector signals
- numbers
- digital processing
- following line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Radio Relay Systems (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides a repeater and a method for removing pilot frequency pollution by the same, belonging to the field of communication. The repeater comprises a near-end machine and a far-end machine, wherein the far-end machine is connected with the near-end machine; the near-end machine also comprises a gain amplifier, an A/D conversion module, a digital processing module and an optical fiber transceiver, wherein the gain amplifier amplifies a downlink simulating intermediate-frequency donor sector signal transmitted by a lower mixer; the A/D conversion module converts the amplified downlink simulating intermediate-frequency donor sector signal into a downlink digital donor sector signal; the digital processing module digitally processes the downlink digital donor sector signal; the optical fiber transceiver transmits the digitally processed downlink digital donor sector signal to the far-end machine in an optical fiber transmission mode; the far-end machine also comprises an optical fiber transceiver and a pseudo-pilot generator, wherein the optical fiber transceiver receives the digitally processed downlink digital donor sector signal transmitted by the near-end machine; and the pseudo-pilot generator overlays the digitally processed downlink digital donor sector signal and a self-generated interference signal in a digital domain to generate a pilot frequency downlink digital donor sector signal. The invention removes the pilot frequency pollution.
Description
Technical field
The invention belongs to the communications field, relate in particular to a kind of repeater and utilize it to remove the method for pilot pollution.
Background technology
(Wideband Code Division Multiple Acess WCDMA) is one of main in the world third generation mobile standard to WCDMA.WCDMA utilizes down link scrambler difference sector, can realize that adjacent sectors uses same carrier frequency, can save frequency resource plot planning the time like this.
WCDMA is the same with other any cellular communication systems, the overlapping area in each sub-district/base station, and the terminal use receives a plurality of sub-district/base station signals, causes the terminal under such environment, to produce frequent the switching even table tennis switching back and forth like this.No matter be to adopt soft handover or direct-cut operation,, also can increase the base station burden, reduce traffic handing capacity even make the user not produce call drop.This situation is that Virtual network operator is reluctant to see, but is difficult to avoid the overlapping of sub-district the network planning time again, for the indoor covering of skyscraper, is more prone to receive peripheral cell especially, or even far signal of base station.
For the WCDMA standard, because every carrier bandwidths is wide, the ability of managing business is strong, thus can use identical frequency in a plurality of sub-districts under a lot of situation, and realize the difference of sector through the down link scrambler.Therefore, at present, at overlapping area; Mobile phone possibly detect a plurality of scramblers, if a plurality of sector signals intensity is suitable, (Ec representes the intensity of useful signal to Ec/Io; Io representes the intensity of all interference signals) also suitable, the state that will be absorbed in frequent switching is called pilot pollution.
Summary of the invention
The object of the present invention is to provide a kind of repeater, be intended to solve the problem that there is pilot pollution in existing repeater.
The present invention realizes like this; A kind of repeater; Comprise: near-end machine and the remote termination that is connected through optical fiber with said near-end machine; Said near-end machine comprises: the alms giver's sector signals receiver module, duplexer, the down-conversion mixer that are linked in sequence successively, and said remote termination comprises: the D/A modular converter, down-conversion mixer, downlink power amplifier, duplexer, the retransmitting antenna that are linked in sequence successively, said near-end machine also comprises:
Gain amplifier is connected with said down-conversion mixer, is used for the descending analog intermediate frequency alms giver sector signals that said down-conversion mixer transmits is amplified;
The A/D modular converter is used for converting down the descending analog intermediate frequency alms giver sector signals after amplifying to line of numbers alms giver sector signals;
Digital signal processing module is used for said line of numbers alms giver sector signals is down carried out digital processing;
Fiber optical transceiver is used for the following line of numbers alms giver's sector signals after the digital processing is transmitted through the fiber to said remote termination;
Said remote termination also comprises:
Fiber optical transceiver is used to receive said near-end machine through the following line of numbers alms giver's sector signals after the said digital processing of Optical Fiber Transmission;
The pilot beacon generator is used for the interference signal of the following line of numbers alms giver's sector signals after the said digital processing and himself generation is superposeed at numeric field, generates line of numbers alms giver sector signals under the anti-pilot tone.
Another object of the present invention is to provide a kind of method of utilizing aforesaid repeater to remove pilot pollution, said method comprises the steps:
The near-end machine receives alms giver's sector signals that donor base station sends through alms giver's sector signals receiver module;
Said near-end machine is isolated descending alms giver's sector signals through duplexer from said alms giver's sector signals;
Said near-end machine converts said descending alms giver's sector signals to descending analog intermediate frequency alms giver sector signals through down-conversion mixer;
Said near-end machine amplifies said descending analog intermediate frequency alms giver sector signals through gain amplifier;
Said near-end machine carries out digitlization through the A/D modular converter to the descending analog intermediate frequency alms giver sector signals after amplifying, and generates line of numbers alms giver sector signals down;
Said near-end machine carries out digital processing through the digital processing technology of digital signal processing module to said line of numbers alms giver sector signals down, utilizes following line of numbers alms giver's sector signals to the remote termination after fiber optical transceiver passes through the Optical Fiber Transmission digital processing;
Said remote termination receives said near-end machine through the following line of numbers alms giver's sector signals after the said digital processing of Optical Fiber Transmission through fiber optical transceiver;
Said remote termination superposes at numeric field through the interference signal of pilot beacon generator with said line of numbers alms giver sector signals down and the generation of said pilot beacon generator, generates line of numbers alms giver sector signals under the anti-pilot tone.
In the present invention, through correct alms giver's sector signals that the gain amplifier of near-end machine amplifies donor base station, strengthen the Ec/Io of alms giver's sector signals; Produce interference signal at remote termination; This interference signal is used the scrambler identical with other base stations/sectors, through superposeing in the donor signal of remote termination with interference signal and the transmission of near-end machine, produces alms giver's sector signals of removing pilot pollution; So simultaneously at the Ec/Io that guarantees alms giver's sector signals; Reduce the Ec/Io of other sector signals, make that other sector signals can not selected in the terminal in the area of coverage, removed pilot pollution.
Description of drawings
Fig. 1 is the structural representation of the repeater that provides of the embodiment of the invention;
Fig. 2 is that the FB(flow block) of the method for pilot pollution is removed in the repeater that utilizes that the embodiment of the invention provides.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
In embodiments of the present invention, through correct alms giver's sector signals that the gain amplifier of near-end machine amplifies donor base station, strengthen the Ec/Io of alms giver's sector signals; Produce interference signal at remote termination; This interference signal is used the scrambler identical with other base stations/sectors, through superposeing in the donor signal of remote termination with interference signal and the transmission of near-end machine, produces alms giver's sector signals of removing pilot pollution; So simultaneously at the Ec/Io that guarantees alms giver's sector signals; Reduce the Ec/Io of other sector signals, make that other sector signals can not selected in the terminal in the area of coverage, removed pilot pollution.
The structure of the repeater that Fig. 1 provides for the embodiment of the invention for the ease of explanation, only shows the relevant part of the embodiment of the invention.In embodiments of the present invention, this repeater is the WCDMA repeater, and this repeater comprises: near-end machine 11, remote termination 12.
Wherein, near-end machine 11 comprises: alms giver's sector signals receiver module 111, duplexer 112, down-conversion mixer 113, gain amplifier 114, A/D modular converter 115, digital signal processing module 116, fiber optical transceiver 117.
In the present embodiment, alms giver's sector signals receiver module 111 is donor antenna or coupler.
Details are as follows for the concrete course of work: near-end machine 11 is at first isolated descending alms giver's sector signals through alms giver's sector signals that alms giver's sector signals receiver module 111 reception donor base stations send through duplexer 112 from said alms giver's sector signals; Convert said descending alms giver's sector signals to descending analog if signal through down-conversion mixer 113 again; Amplify through 114 pairs of said descending analog if signals of gain amplifier; Strengthen the Ec/Io of alms giver's sector signals; Descending analog intermediate frequency alms giver sector signals through after 115 pairs of said amplifications of A/D modular converter is carried out digitlization; Utilize digital processing technology to handle through the following line of numbers alms giver's sector signals after 116 pairs of digitlizations of digital signal processing module again; Comprise and carry out filtering, signal processing, and the following line of numbers alms giver's sector signals after handling through fiber optical transceiver 117 transmission of digital is to remote termination 12.
Wherein, pilot beacon generator 122 also comprises: scrambler generation unit, pseudo-random signal generation unit, interference signal generation unit, interference signal and descending alms giver's sector signals superpositing unit.
The scrambler generation unit is used for according to the pilot frequency sequence that obtains and the speed of the following line of numbers alms giver's sector signals after receiving digital processing generates scrambler, comprising: pilot frequency sequence obtains subelement, scrambler produces subelement, scrambler rate-matched subelement.Details are as follows for the concrete course of work: the mode that anti-pilot pollution digital high-frequency amplification station obtains pilot frequency sequence has two kinds, and a kind of is to import the pilot frequency sequence that needs interference manually; A kind of in addition is the pilot frequency sequence that from the on-air radio signal, analyzes neighbor cell automatically; In embodiments of the present invention; The pilot frequency sequence of anti-pilot pollution digital high-frequency amplification station obtains subelement and supports the pilot frequency sequence of the different carrier frequencies of above-mentioned dual mode to obtain simultaneously; Scrambler produces subelement and obtains 38400 scrambler chips of pilot frequency sequence generation that subelement obtains according to pilot frequency sequence; Scrambler rate-matched unit adjustment scrambler spreading rate makes and the following line of numbers alms giver's sector signals speed that obtains of sampling is complementary.
The pseudo-random signal generation unit be used for according to the frame synchronizing signal that receives the following line of numbers alms giver's sector signals after the digital processing generate with said digital processing after the identical pseudo-random signal of following line of numbers alms giver's sector signals speed, the pseudo-random signal generation unit comprises: frame synchronization subelement, pseudo-random signal generation subelement.Details are as follows: following line of numbers alms giver's sector signals that the frame synchronization unit receives according to fiber optical transceiver 121 for the concrete course of work; The demodulation synchronous channel SCH; Obtain the frame synchronizing signal of air interface; The frame synchronizing signal that pseudo-random signal generation subelement utilizes the synchronous channel SCH chnnel coding produces and the identical pseudo-random signal of following line of numbers alms giver's sector signals speed as initial value.
The pseudo-random signal that the interference signal generation unit generates said pseudo-random signal generation unit multiplies each other with the scrambler that carries out through scrambler rate-matched subelement after the rate-matched, obtains interference signal.
Interference signal and descending alms giver's sector signals superpositing unit with a plurality of interference signals according to carrier frequency be added to respectively with following line of numbers alms giver's sector signals frequency points corresponding on, generate line of numbers alms giver sector signals under the anti-pilot tone.
As a preferred embodiment of the present invention; Pilot beacon generator 122 also comprises: the interference signal amplitude adjustment unit; Be used for amplitude according to each interference signal of actual strength adjustment of other cell signals in the area of coverage; Make and the effect that to play interference can not make that also total aerial signal amplitude is too big.
D/A modular converter 123 converts line of numbers alms giver sector signals under the anti-pilot tone of said interference signal and the generation of descending alms giver's sector signals superpositing unit to anti-pilot tone and simulates descending alms giver's sector signals; Through down-conversion mixer 124 it is reduced into radiofrequency signal; 125 pairs of said radiofrequency signals of downlink power amplifier are amplified through duplexer removal upward signal again; Isolate anti-pilot tone and simulate descending alms giver's sector signals, through retransmitting antenna 127 outputs.
Fig. 2 is that the method for pilot pollution is removed in the repeater that utilizes that the embodiment of the invention provides, and details are as follows:
In step S201, the near-end machine receives alms giver's sector signals that donor base station sends through alms giver's sector signals receiver module.
In step S202, the near-end machine is isolated descending alms giver's sector signals through duplexer from said alms giver's sector signals.
In step S203, the near-end machine converts said descending alms giver's sector signals to descending analog if signal through down-conversion mixer.
In step S204, the near-end machine amplifies said descending analog if signal through gain amplifier, strengthens the Ec/Io of alms giver's sector signals.
In step S205, the near-end machine carries out the A/D sampling through the A/D modular converter to the descending analog intermediate frequency alms giver sector signals after amplifying, and makes it digitlization, generates line of numbers alms giver sector signals down.
In step S206, the digital processing technology of near-end machine through digital signal processing module carries out digital processing to said line of numbers alms giver sector signals down, utilizes fiber optical transceiver to pass through following line of numbers alms giver's sector signals after the Optical Fiber Transmission digital processing to remote termination.
As one embodiment of the present of invention; The near-end machine utilizes the digital processing technology of digital signal processing module that digitized descending alms giver's sector signals is carried out digital processing; Comprise Filtering Processing, signal processing, utilize fiber optical transceiver to pass through following line of numbers alms giver's sector signals after this digital processing of Optical Fiber Transmission at last to remote termination.
In step S207, remote termination receives the following line of numbers alms giver sector signals of near-end machine after through the said digital processing of fiber optical transceiver transmission through fiber optical transceiver.
In step S208, remote termination superposes at numeric field through the interference signal of pilot beacon generator with said line of numbers alms giver sector signals down and the generation of pilot beacon generator, generates line of numbers alms giver sector signals under the anti-pilot tone.
As one embodiment of the present of invention, the mode that anti-pilot pollution digital high-frequency amplification station obtains pilot frequency sequence has two kinds, and a kind of is to import the pilot frequency sequence that needs interference manually; A kind of in addition is the pilot frequency sequence that from the on-air radio signal, analyzes neighbor cell automatically; In embodiments of the present invention; The pilot beacon generator of anti-pilot pollution digital high-frequency amplification station supports the pilot frequency sequence of the different carrier frequencies of above-mentioned dual mode to obtain simultaneously; Generate 38400 scrambler chips according to the pilot frequency sequence that obtains, adjustment scrambler spreading rate makes and the following line of numbers alms giver's sector signals speed that obtains of sampling is complementary.
Said pilot beacon generator can also be according to the following line of numbers alms giver's sector signals that receives; The demodulation synchronous channel SCH; Obtain the frame synchronizing signal of air interface, the frame synchronizing signal of utilizing the synchronous channel SCH chnnel coding produces and the identical pseudo-random signal of following line of numbers alms giver's sector signals speed as initial value; Pseudo-random signal that generates and the scrambler that carries out after the rate-matched are multiplied each other, obtain interference signal.
With a plurality of interference signals according to carrier frequency be added to respectively with following line of numbers alms giver's sector signals frequency points corresponding on, generate line of numbers alms giver sector signals under the anti-pilot tone.
In step S209, remote termination converts line of numbers alms giver sector signals under the said anti-pilot tone to anti-pilot tone through the D/A modular converter and simulates descending alms giver's sector signals.
In step S210, remote termination is simulated descending alms giver's sector signals through frequency mixer with said anti-pilot tone and is reduced into radiofrequency signal.
In step S211, remote termination is removed wherein upward signal through duplexer, through power amplifier said radiofrequency signal is amplified back output.
In embodiments of the present invention, through correct alms giver's sector signals that the gain amplifier of near-end machine amplifies donor base station, strengthen the Ec/Io of alms giver's sector signals; Produce interference signal at remote termination, this interference signal is used the scrambler identical with other base stations/sectors, through superposeing in the donor signal of remote termination with interference signal and the transmission of near-end machine; Produce alms giver's sector signals of removing pilot pollution, so simultaneously, reduce the Ec/Io of other sector signals at the Ec/Io that guarantees alms giver's sector signals; Make the terminal in the area of coverage can not select other sector signals; Remove pilot pollution, also avoided unnecessary switching, and; Owing to only down link is disturbed, so have no interference for the operate as normal of base station.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. repeater; Comprise: near-end machine and the remote termination that is connected through optical fiber with said near-end machine; Said near-end machine comprises: the alms giver's sector signals receiver module, duplexer, the down-conversion mixer that are linked in sequence successively; Said remote termination comprises: the D/A modular converter, down-conversion mixer, downlink power amplifier, duplexer, the retransmitting antenna that are linked in sequence successively is characterized in that said near-end machine also comprises:
Gain amplifier is connected with said down-conversion mixer, is used for the descending analog intermediate frequency alms giver sector signals that said down-conversion mixer transmits is amplified;
The A/D modular converter is used for converting down the descending analog intermediate frequency alms giver sector signals after amplifying to line of numbers alms giver sector signals;
Digital signal processing module is used for said line of numbers alms giver sector signals is down carried out digital processing;
Fiber optical transceiver is used for the following line of numbers alms giver's sector signals after the digital processing is transmitted through the fiber to said remote termination;
Said remote termination also comprises:
Fiber optical transceiver, the fiber optical transceiver that is used to receive said near-end machine is through the following line of numbers alms giver's sector signals after the said digital processing of Optical Fiber Transmission;
The pilot beacon generator is used for the interference signal of the following line of numbers alms giver's sector signals after the said digital processing and himself generation is superposeed at numeric field, generates line of numbers alms giver sector signals under the anti-pilot tone.
2. repeater as claimed in claim 1 is characterized in that, said pilot beacon generator comprises:
The scrambler generation unit is used for according to the pilot frequency sequence that obtains and the speed of the following line of numbers alms giver's sector signals after receiving digital processing generates scrambler;
The pseudo-random signal generation unit, be used for according to the frame synchronizing signal that receives the following line of numbers alms giver's sector signals after the digital processing generate with said digital processing after the identical pseudo-random signal of following line of numbers alms giver's sector signals speed;
The interference signal generation unit is used for the pseudo-random signal of said pseudo-random signal generation unit generation and the scrambler of said scrambler generation unit generation are multiplied each other, and obtains interference signal;
Interference signal and descending alms giver's sector signals superpositing unit; Following line of numbers alms giver's sector signals that the interference signal that is used for said interference signal generation unit is generated and said receives after the digital processing superposes at numeric field, generates line of numbers alms giver sector signals under the anti-pilot tone.
3. repeater as claimed in claim 2 is characterized in that, said scrambler generation unit comprises:
Pilot frequency sequence obtains subelement, is used to obtain the pilot frequency sequence of neighbor cell;
Scrambler produces subelement, is used for obtaining the pilot frequency sequence generation scrambler chip that subelement obtains according to said pilot frequency sequence;
Scrambler rate-matched subelement is used for according to the following line of numbers alms giver's sector signals adjustment scrambler spreading rate that receives after the digital processing, and the following line of numbers alms giver's sector signals speed that makes said scrambler spreading rate and said receive after the digital processing is complementary.
4. repeater as claimed in claim 2 is characterized in that, said pseudo-random signal generation unit comprises:
The frame synchronization subelement is used for according to the following line of numbers alms giver's sector signals after the digital processing that receives, and the demodulation synchronous channel SCH obtains the frame synchronizing signal of air interface;
Pseudo-random signal produces subelement, and the frame synchronizing signal that is used to utilize said synchronous channel SCH chnnel coding is as initial value, produce with the said digital processing that receives after the identical pseudo-random signal of following line of numbers alms giver's sector signals speed.
5. repeater as claimed in claim 2 is characterized in that, said pilot beacon generator also comprises:
The interference signal amplitude adjustment unit is used for the amplitude according to each interference signal of actual strength adjustment of neighbor cell signal in the area of coverage.
6. the method for pilot pollution is eliminated in each described repeater of utilization such as claim 1 to 5, it is characterized in that said method comprises the steps:
The near-end machine receives alms giver's sector signals that donor base station sends through alms giver's sector signals receiver module;
Said near-end machine is isolated descending alms giver's sector signals through duplexer from said alms giver's sector signals;
Said near-end machine converts said descending alms giver's sector signals to descending analog intermediate frequency alms giver sector signals through down-conversion mixer;
Said near-end machine amplifies said descending analog intermediate frequency alms giver sector signals through gain amplifier;
Said near-end machine carries out digitlization through the A/D modular converter to the descending analog intermediate frequency alms giver sector signals after amplifying, and generates line of numbers alms giver sector signals down;
Said near-end machine carries out digital processing through the digital processing technology of digital signal processing module to said line of numbers alms giver sector signals down, utilizes following line of numbers alms giver's sector signals to the remote termination after fiber optical transceiver passes through the Optical Fiber Transmission digital processing;
Said remote termination receives the fiber optical transceiver of said near-end machine through the following line of numbers alms giver's sector signals after the said digital processing of Optical Fiber Transmission through fiber optical transceiver;
Said remote termination superposes at numeric field through the interference signal of pilot beacon generator with said line of numbers alms giver sector signals down and the generation of said pilot beacon generator, generates line of numbers alms giver sector signals under the anti-pilot tone.
7. method as claimed in claim 6; It is characterized in that; Said remote termination superposes at numeric field through the interference signal that following line of numbers alms giver's sector signals and the said pilot beacon generator of pilot beacon generator after with digital processing produces, and the step that generates line of numbers alms giver sector signals under the anti-pilot tone is specially:
Speed according to the following line of numbers alms giver's sector signals after pilot frequency sequence that obtains and the digital processing that receives generates scrambler;
According to the frame synchronizing signal of the following line of numbers alms giver's sector signals after the said digital processing that receives generate with said digital processing after the identical pseudo-random signal of following line of numbers alms giver's sector signals speed;
Said pseudo-random signal and scrambler are multiplied each other, obtain interference signal;
Following line of numbers alms giver's sector signals that said interference signal and said is received after the digital processing superposes at numeric field, generates line of numbers alms giver sector signals under the anti-pilot tone.
8. method as claimed in claim 7 is characterized in that, the step that the speed of the following line of numbers alms giver's sector signals after pilot frequency sequence that said basis is obtained and the digital processing that receives generates scrambler is specially:
Obtain the pilot frequency sequence of neighbor cell;
Generate the scrambler chip according to said pilot frequency sequence;
According to the following line of numbers alms giver's sector signals adjustment scrambler spreading rate that receives after the digital processing, the following line of numbers alms giver's sector signals speed that makes said scrambler spreading rate and said receive after the digital processing is complementary.
9. method as claimed in claim 7; It is characterized in that, the frame synchronizing signal of the following line of numbers alms giver's sector signals after the said digital processing that said basis receives generate with said digital processing after the step of the identical pseudo-random signal of following line of numbers alms giver's sector signals speed be specially:
According to the following line of numbers alms giver's sector signals after the digital processing that receives, the demodulation synchronous channel SCH obtains the frame synchronizing signal of air interface;
The frame synchronizing signal of utilizing said synchronous channel SCH chnnel coding is as initial value, produce with the said digital processing that receives after the identical pseudo-random signal of following line of numbers alms giver's sector signals speed.
10. method as claimed in claim 7; It is characterized in that; In that said interference signal and said following line of numbers alms giver's sector signals after receiving digital processing are superposeed at numeric field, generate before the step of line of numbers alms giver sector signals under the anti-pilot tone, said method also comprises the steps:
Adjust the amplitude of each interference signal according to the actual strength of neighbor cell signal in the area of coverage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101899199A CN101651498B (en) | 2009-08-28 | 2009-08-28 | Repeater and method for removing pilot frequency pollution by same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101899199A CN101651498B (en) | 2009-08-28 | 2009-08-28 | Repeater and method for removing pilot frequency pollution by same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101651498A CN101651498A (en) | 2010-02-17 |
| CN101651498B true CN101651498B (en) | 2012-05-23 |
Family
ID=41673635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101899199A Expired - Fee Related CN101651498B (en) | 2009-08-28 | 2009-08-28 | Repeater and method for removing pilot frequency pollution by same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101651498B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102104416B (en) * | 2010-12-16 | 2014-05-21 | 深圳市皓华网络通讯有限公司 | Digital repeater and downlink signal processing method thereof |
| US9929805B2 (en) | 2016-05-11 | 2018-03-27 | Huawei Technologies Co., Ltd. | Generating a pilot tone for an optical telecommunications system |
| CN109348503B (en) * | 2018-11-20 | 2021-11-26 | 广东工业大学 | Monitoring method, device, equipment and system for wireless communication link |
| CN109327230B (en) * | 2018-11-29 | 2020-08-28 | 京信通信系统（中国）有限公司 | Method and device for hybrid transmission of digital analog signals and DAS (data acquisition System) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1808948A (en) * | 2006-02-17 | 2006-07-26 | 南京泰通科技有限公司 | Common frequency optical fiber repeater for railway |
| CN200941617Y (en) * | 2005-12-19 | 2007-08-29 | 京信通信技术(广州)有限公司 | Mobile communicating directly releasing station system adopting digital IF way |
| US7437159B1 (en) * | 2001-06-21 | 2008-10-14 | Sprint Spectrum L.P. | Method and system for overcoming pilot pollution in a wireless communications network |
-
2009
- 2009-08-28 CN CN2009101899199A patent/CN101651498B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7437159B1 (en) * | 2001-06-21 | 2008-10-14 | Sprint Spectrum L.P. | Method and system for overcoming pilot pollution in a wireless communications network |
| CN200941617Y (en) * | 2005-12-19 | 2007-08-29 | 京信通信技术(广州)有限公司 | Mobile communicating directly releasing station system adopting digital IF way |
| CN1808948A (en) * | 2006-02-17 | 2006-07-26 | 南京泰通科技有限公司 | Common frequency optical fiber repeater for railway |
Non-Patent Citations (2)
| Title |
|---|
| Niemela, J..Mitigation of pilot pollution through base station antenna configuration in WCDMA.《Vehicular Technology Conference, 2004. VTC2004-Fall. 2004 IEEE 60th》.2004,第6卷4270 - 4274. |
| Niemela, J..Mitigation of pilot pollution through base station antenna configuration in WCDMA.《Vehicular Technology Conference, 2004. VTC2004-Fall. 2004 IEEE 60th》.2004,第6卷4270- 4274. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101651498A (en) | 2010-02-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7272362B2 (en) | Multi-sector in-building repeater | |
| CN1096159C (en) | Multi-user communication system architecture with distributed receivers | |
| CN101453228A (en) | Common station address interference elimination system and method | |
| CN105471490B (en) | Repeater and signal processing method thereof | |
| CN101651498B (en) | Repeater and method for removing pilot frequency pollution by same | |
| US9813120B2 (en) | Base station, and method and device for returning signal | |
| CN101494493B (en) | Digital direct discharging station using digital microwave transmission | |
| US20160112078A1 (en) | Terminal and power charching method thereof | |
| CN102164109B (en) | Downlink frequency offset compensation method and repeater used for performing downlink frequency offset compensation | |
| CN102469469A (en) | Vehicle-mounted double-channel correcting repeater | |
| KR100758883B1 (en) | Digital multiple path signal matching device of repeater | |
| JP2006186997A (en) | Premises wireless distributed relay system using digital signal processing | |
| KR20060084755A (en) | Mobile coumunication relay apparatus, relay system and method using the same | |
| US20050136849A1 (en) | Method and apparatus for enhancing the call access rate in a communication system | |
| KR20020011638A (en) | Method and system of optical-repeating for muti-frequency bands | |
| CN101119127B (en) | Method to implement in-band gain balance of working frequency band for frequency-select module of repeater | |
| KR100317939B1 (en) | Repeater having apparatus for slecting code in a mobile communication system | |
| KR100246564B1 (en) | Equipment of bts in wll | |
| CN215420247U (en) | Digital multi-channel signal far-end frequency conversion device | |
| JP2011082948A (en) | Digital transmission repeater for cdma/wcdma based mobile communication system and transmission method in digital transmission repeater | |
| CN202759596U (en) | Tower top amplifier based on dual-carrier frequency-hopping technology | |
| KR100292657B1 (en) | Apparatus for generating Pilot Beacon Singnal | |
| CN111130682B (en) | Signal processing method and device | |
| CN102104416A (en) | Digital repeater and downlink signal processing method thereof | |
| CN102195673A (en) | Method for eliminating pilot pollution |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120523 Termination date: 20140828 |
|
| EXPY | Termination of patent right or utility model |